HR: 1340h
AN: A13E-1595    [Abstracts]
TI: A Southern Ocean cyclone climatology based on high resolution NWP model output
AU: * Uotila, P J
EM: Petteri.Uotila@arts.monash.edu.au
AF: School of Geography and Environmental Science, Monash University, Building 11, Clayton Campus, Clayton, VIC 3800, Australia
AU: Lynch, A H
EM: Amanda.Lynch@arts.monash.edu.au
AF: School of Geography and Environmental Science, Monash University, Building 11, Clayton Campus, Clayton, VIC 3800, Australia
AU: Cassano, J J
EM: cassano@cires.colorado.edu
AF: CIRES/Univ. of Colorado, 216 UCB, Boulder, CO 80309, United States
AB: Mesoscale cyclones over the Southern Ocean represent an important element in the global circulation of heat and moisture and the maintenance of Southern Hemisphere climate. We seek to advance the understanding of atmospheric processes responsible for the development and decay of Southern Ocean mesocyclones and to explore the interactions between these cyclones and the underlying surface conditions, including sea ice extent, thickness, concentration, motion, and temperature. In this presentation, we will describe a Southern Ocean mesocyclone climatology, created based on the Antarctic Mesoscale Prediction System (AMPS) output. The method applied to construct the climatology utilizes the Self-Organizing Map (SOM) technique. The seasonal variability between large-scale circulation patterns and their association to the cyclone formation over the Southern Ocean is of particular interest. In addition, variables that influence the formation of a cyclogenetic environment, such as sea surface temperatures and the sea-ice extent, are analysed.
DE: 0555 Neural networks, fuzzy logic, machine learning
DE: 1620 Climate dynamics (0429, 3309)
DE: 3309 Climatology (1616, 1620, 3305, 4215, 8408)
DE: 3349 Polar meteorology
DE: 3364 Synoptic-scale meteorology
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting